WO2019095995A1 - 大功率便携式用电设备及其电源控制装置及方法 - Google Patents
大功率便携式用电设备及其电源控制装置及方法 Download PDFInfo
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- WO2019095995A1 WO2019095995A1 PCT/CN2018/112653 CN2018112653W WO2019095995A1 WO 2019095995 A1 WO2019095995 A1 WO 2019095995A1 CN 2018112653 W CN2018112653 W CN 2018112653W WO 2019095995 A1 WO2019095995 A1 WO 2019095995A1
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- power source
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- the present application relates to the field of high-power portable electric equipment, and in particular to a high-power portable electric equipment and a power control device and method thereof.
- High-power portable electrical equipment such as electric welders, cutting machines, etc.
- a fuel generator is generally required to cooperate.
- the fuel generator is bulky, heavy, and difficult to handle, and cannot meet the application conditions such as aerial work, underground pipeline maintenance, mine construction, emergency rescue, etc., and the fuel generator will bring air pollution, noise pollution, etc. during work.
- a cordless welding and cutting device powered by a lithium battery which has the advantages of being portable and non-polluting. It can be fully loaded for 10 to 30 minutes on a single charge, which is very suitable for emergency use in the field for a short time.
- a device also has obvious disadvantages because it is limited by the capacity of the rechargeable battery pack, the single working time is short, and the battery charging time is relatively long, which cannot meet the needs of continuous production operations.
- the purpose of the embodiments of the present application is to provide a high-power portable electric device and a power control device and method thereof, so as to improve the operation duration of the existing high-power portable electric device.
- the embodiment of the present application provides a power control device for a high-power portable electrical device, including:
- controllable switch wherein an input end thereof is coupled to an output end of the first direct current power source and the second direct current power source, and an output end of the controllable switch forms an output of the power control device;
- a control unit wherein the detecting end is coupled to the output ends of the first DC power source and the second DC power source respectively through a corresponding signal collecting module, and a control end thereof is coupled with a control end of the controllable switch, and is configured to be coupled to the control end of the controllable switch And controlling a switching state of the controllable switch according to the sampling signal acquired by the detecting end.
- controllable switch wherein an input end thereof is coupled to an output end of the first direct current power source and the second direct current power source, and an output end of the controllable switch forms an output of the power control device;
- a control unit wherein the detecting end is coupled to the output ends of the first DC power source and the second DC power source respectively through a corresponding signal collecting module, and a control end thereof is coupled with a control end of the controllable switch, and is configured to be coupled to the control end of the controllable switch And controlling a switching state of the controllable switch according to the sampling signal acquired by the detecting end.
- the embodiment of the present application further provides a power control method for a high-power portable electric device, including:
- An input end of the controllable switch is coupled to an output end of the first DC power source and the second DC power source, and an output end of the controllable switch forms an output of the power control device;
- the detecting end of the control unit is coupled to the output ends of the first DC power source and the second DC power source respectively through a corresponding signal collecting module, and the control end of the control unit and the control end of the controllable switch coupling.
- the power control device of the high-power portable electric equipment of the embodiment of the present application includes a first DC power source, a second DC power source, a controllable switch and a control unit; wherein the input ends of the controllable switch are respectively connected to the first DC power source and the first The output end of the two DC power source is coupled, and the output end of the controllable switch forms an output of the power control device; the detection end of the control unit is coupled to the output end of the first DC power source and the second DC power source through a corresponding signal acquisition module, and is controlled The control end of the unit is coupled to the control end of the controllable switch, and the control unit is configured to control the switching state of the controllable switch according to the sampling signal acquired by the detecting end, thereby enabling the control unit to be from the first DC power source and the second DC power source according to the situation.
- FIG. 1 is a block diagram showing the circuit principle of a power control device for a high-power portable electric device according to an embodiment of the present application
- FIG. 2 is a block diagram showing the circuit principle of a power control device for a high-power portable electric device according to another embodiment of the present application;
- FIG. 3 is a block diagram showing the circuit principle of a power control device for a high-power portable electric device according to another embodiment of the present application;
- FIG. 4 is a block diagram showing the circuit principle of a power control device for a high-power portable electric device according to another embodiment of the present application.
- FIG. 5 is a block diagram showing the circuit principle of a power control device for a high-power portable electric device according to another embodiment of the present application.
- FIG. 6 is a block diagram showing the circuit principle of a power control device for a high-power portable electric device according to another embodiment of the present application.
- FIG. 7 is a flowchart of a power control method for a high-power portable electric device according to an embodiment of the present application.
- FIG. 8 is a flowchart of a power control method for a high-power portable electric device according to an embodiment of the present application.
- FIG. 9 is a circuit schematic diagram of a power control device for a high-power portable electric device according to an embodiment of the present application.
- FIG. 10 is a circuit schematic diagram of a power control device for a high-power portable electric device according to another embodiment of the present application.
- the high-power portable electric device of the embodiment of the present application may include a power control device, and a load coupled to an output of the power control device; and a power supply of the load may be selected by the power control device.
- the high power portable electrical device can be, for example, a portable electric welder, a portable cutter, etc., which are generally powered by batteries.
- the power control device of the high-power portable electric device may include a first DC power source, a second DC power source, a controllable switch, and a control unit. This method is simple in structure and high in efficiency.
- the input end of the controllable switch is respectively coupled to the output ends of the first DC power source and the second DC power source, and the output end of the controllable switch forms an output of the power control device
- the detecting end of the control unit is respectively coupled to the output ends of the first DC power source and the second DC power source through a corresponding signal collecting module, and the control end of the control unit and the controllable switch The control terminals are coupled.
- the control unit is configured to control a switching state of the controllable switch according to a sampling signal acquired by the detecting end, thereby implementing selection and control of a power supply of the load.
- the high-power portable electric device may include a DC output of the power control device as a power supply for a high-power portable electric device (such as an electric welder or a cutting machine), thereby forming a plug-in hybrid power.
- a high-power portable electric device such as an electric welder or a cutting machine
- the high-power portable electric equipment makes it capable of both portability and continuous operation, and can work in the presence or absence of alternating current, greatly expanding the application scenario of high-power portable electric equipment.
- the power control device of the high-power portable electric device may further include a charging module, respectively, the first DC power source, the second DC power source, and the The control unit is coupled to the second DC power source by using the first DC power source under the control of the control unit, that is, the DC power output by the first DC power source is used as an input, The second DC power source is charged.
- the charging can be constant current charging, constant voltage charging, or constant power charging.
- the control unit When the second DC power source is provided with a charging condition (normal voltage is not full, temperature is normal), the control unit turns on the charging module; when the second DC power source is abnormal (such as overvoltage, overcurrent, over temperature) The control unit can turn off the charging module. In this way, while the first DC power source has AC power and supplies power to the load, the second DC power source can be supplemented with electric energy without additional charging time, thereby improving the high power. Utilization of portable electrical equipment.
- the first DC power source may include an AC input terminal and a rectification filter module.
- the input end of the rectifying and filtering module is coupled to the AC input terminal, and the output end of the rectifying and filtering module is coupled to the control unit and the controllable switch, respectively.
- the first DC power supply through the AC input terminal can be connected to an alternating current, such as 110V alternating current, 220V alternating current, 380V alternating current, etc.; the rectifying and filtering module can convert the alternating current into direct current.
- the AC input terminal may be a power connector.
- the rectification filter module may be a rectification filter circuit or an integrated rectification filter device or the like.
- the first DC power source may further include a DC converter to rectify the method by step-up or step-down.
- the DC power output by the filter module is converted into DC power suitable for the load.
- the DC converter may be a DC-DC converter circuit or an integrated DC-DC converter (Direct Current, DC/DC for short).
- the DC-DC conversion circuit can be implemented by, for example, a full bridge, a half bridge, a push pull, a Buck, a Boost, or the like.
- the second DC power source may be a rechargeable battery pack, such as a rechargeable lithium battery pack or the like.
- the rechargeable battery pack can be detachable to facilitate replacement and maintenance of the battery pack.
- the second DC power source may further include a DC converter, and the DC converter respectively and the control unit and the Rechargeable battery pack coupling.
- the DC converter can convert the DC power output by the rechargeable battery pack into DC power suitable for the load by boosting or stepping down.
- the DC converter may be a DC-DC converter circuit or an integrated DC-DC converter.
- the DC-DC conversion circuit can be implemented by, for example, a full bridge, a half bridge, a push pull, a Buck, a Boost, or the like.
- the first DC power source may further include a first inverter arc welding circuit (ie, the inverter arc welding circuit 1 in FIG. 5); the second DC power source further A second inverter arc welding circuit (ie, the inverter arc welding circuit 2 in FIG. 5) may be included.
- the input end of the first inverter arc welding circuit is electrically connected to the output end of the rectifying and filtering module, and the output end of the first inverter arc welding circuit and the input end of the controllable switch are electrically connected. Connected, and the first inverter arc welding circuit is controlled by the control unit.
- the second inverter arc welding circuit is electrically connected to the control unit and the rechargeable battery pack, respectively.
- control unit can be implemented by a hardware circuit composed of electronic components and logic elements (or logic circuits) or the like.
- control unit may be a processor.
- the processor may be, for example, a Microcontroller Unit (MCU) (such as a single chip microcomputer), a Digital Signal Processing (DSP), and a Digital Signal Controller (Digital Signal Controller). , referred to as DSC), programmable logic device (Programmable Logic Device, PLD), ARM (Acorn RISC Machine) processor and other programmable integrated circuit modules.
- MCU Microcontroller Unit
- DSP Digital Signal Processing
- DSC Digital Signal Controller
- PLD programmable logic device
- ARM Acorn RISC Machine
- the signal acquisition module described above may be a voltage sampling module or the like.
- the switching state of the controllable switch is controlled according to the sampling signal acquired by the detecting end, and the voltage obtained by the detecting end may be processed according to a preset algorithm. Signaling, and controlling the switching state of the controllable switch according to the processing result.
- the following describes the power control method for high-power portable electrical equipment.
- the voltage signal acquired by the detecting end is processed according to a preset algorithm, and the switching state of the controllable switch is controlled according to the processing result, as shown in FIG. 7 , first according to the obtained from the detecting end.
- the voltage signal confirms whether the first DC power source is connected to the AC power; generally, the first DC power source has no output when there is no AC power access, and the first DC power is available after AC power is connected.
- the power supply outputs a voltage signal that can be acquired by the signal sampling module.
- the controllable switch When it is confirmed that the output voltage value of the first DC power source is in the preset voltage range, the controllable switch is controlled to operate in the first DC power output mode.
- the controlling the controllable switch to operate in the first DC power output mode means: when the controllable switch is not currently in the first DC power output mode, controlling the controllable switch to switch to The first DC power output mode; maintaining the controllable switch in the first DC power output mode when the controllable switch is currently in the first DC power output mode.
- the controllable switch is controlled to operate in the second DC power output mode when it is confirmed that the output voltage value of the first DC power source is outside the preset voltage range.
- the controlling the controllable switch to operate in the second DC power output mode means: when the controllable switch is not currently in the second DC power output mode, controlling the controllable switch to switch to the a second DC power output mode; maintaining the controllable switch in the second DC power output mode when the controllable switch is currently in the second DC power output mode.
- the controllable switch when the output voltage value of the first DC power source is confirmed to be in the preset voltage range, the controllable switch is controlled to operate in the first straight
- the streaming power output mode can include:
- the controllable switch After the output voltage value of the first DC power source is determined to be within the preset voltage range, and the output of the controllable switch is not loaded, the controllable switch is controlled to operate in the first straight Streaming power output mode. In this way, the impact damage caused by the live switch of the controllable switch can be prevented or the life of the controllable switch can be shortened.
- the preset voltage range may be a (1 ⁇ b%), where a is a rated voltage value of the second DC power source, and b is a preset constant (according to actual needs) ).
- the preset voltage range may be, for example, a (1 ⁇ 30%). That is to say, in the embodiment, the output voltage value of the first DC power source should be matched with the rated voltage value of the second DC power source as much as possible. In an embodiment, for example, the output voltage value of the first DC power source is 310V DC, and the preset voltage range is between 217V and 403V, confirming that the output voltage of the first DC power source is located. Within the preset voltage range.
- the power control method does not perform a switching action when the high-power portable electric device is working, preventing a sudden power failure during the switching process from causing damage to the high-power portable electric device, and preventing the Damage to the control switch due to live disconnection or shortened service life.
- whether the high-power portable electrical device is working can be judged by collecting the current of the output of the controllable switch; if the current of the controllable switch has a current, the high-power portable electrical device is working, otherwise The high-power portable electric equipment is in a non-working state such as shutdown or standby.
- the current collecting the output of the controllable switch can be realized by serially sampling the resistor at the output of the controllable switch; in another embodiment, the current collecting the output of the controllable switch can also be detected by high power.
- the working state trigger switch of the portable electric device is realized.
- the first DC power source has an AC input of 220V/AC
- the first DC power source is rectified by diodes D1, D2, D3, and D4, and then passes through the capacitor.
- C1, C2 filter to obtain 310V DC, under the condition of stable AC input voltage, to ensure that the voltage difference between the first DC power supply and the second DC power supply does not exceed ⁇ 30%, the voltage of the rechargeable battery pack of the second DC power supply It should be 310V ⁇ 30%.
- the rechargeable battery pack of the second DC power source is composed of a lithium battery.
- the power cannot be completely emptied in consideration of the storage requirement, if the discharge voltage range thereof Between 2.7V and 4.2V, the number of optional lithium battery strings is 81 strings to 95 strings.
- the voltage after the lithium battery is connected in series is as close as possible to 310V.
- the number of lithium battery strings can be set to 86 strings, and the nominal voltage of the rechargeable lithium battery pack is 309.6V, which satisfies the above. Power requirements.
- the voltage acquisition 1 is divided by the resistors R1 and R2 to collect the output voltage of the first DC power source, and is fed back to the control unit for determining whether the first DC power source is connected to the AC power, and Whether the output voltage of a DC power supply is within the normal range (ie, the preset range).
- the voltage acquisition 2 is divided by the resistors R3 and R4 to collect the voltage of the rechargeable battery pack in the second DC power source, and is fed back to the control unit for detecting whether the voltage of the rechargeable battery pack is within a normal range (ie, a preset range). To prevent overcharging and overdischarging of the rechargeable battery pack.
- Current acquisition 1 is used to collect the output current of the rechargeable battery pack, and the collected information is fed back to the control unit by the sampling resistor R5 to prevent overcurrent or short circuit when the rechargeable battery pack is discharged.
- the rechargeable battery pack may further be provided with a temperature collecting module for the control unit to obtain temperature information of the rechargeable battery pack to ensure that the rechargeable battery pack is charged and discharged at a normal temperature.
- the output of the rechargeable battery pack is also connected in series with the controllable switch 2, and the controllable switch 2 is controlled by the control unit only when the voltage acquisition 2, the current acquisition 1 and the temperature acquisition module detect The data is in the normal range, and the controllable switch 2 is closed. If abnormal conditions such as undervoltage, overvoltage, high temperature and overcurrent occur, the control unit will disconnect the controllable switch 2 to ensure the safe use of the rechargeable battery pack.
- the output positive pole of the first DC power supply is connected to the A terminal of the controllable switch K1
- the output positive pole of the second DC power supply is connected to the B terminal of the controllable switch K1
- the first DC power supply and The output of the second DC power supply is shorted to the negative pole.
- the output of the controllable switch is a DC output
- the inverter arc welding circuit composed of the switching tubes Q1, Q2, Q3, Q4, the transformer T1, the diodes D5 and D6, and the sampling resistor R6 is connected.
- the switch tubes Q1, Q2, Q3, Q4 and the transformer T1 form a full-bridge inverter circuit, and the output of the transformer T1 is integrated into a DC output welding power source through the diodes D5 and D6.
- the sampling resistor R6 constitutes a current sample 2 for controlling the conduction state of the switching tube according to the detected welding current to obtain an output external characteristic suitable for welding.
- the controller controls the controllable switch to be connected to the A terminal.
- the controllable switch is connected to the B terminal, if the voltage and current of the rechargeable battery pack are If the temperature and other parameters are normal, the controllable switch 2 is closed, so that the second DC power supply separately supplies power to the inverter arc welding circuit.
- the AC input of the first DC power source is set to 220V/AC, and after being rectified and filtered, 310V DC power is obtained; and the rechargeable battery pack in the second DC power source is set to For the 43-string lithium battery pack, the nominal voltage of the rechargeable battery pack is 154.8V, which is 50% different from the voltage after rectification and filtering of the first DC power supply, exceeding 30%.
- the first DC power supply is stepped down.
- the switching transistor Q5, the diode D7, the inductor L1, and the capacitor C3 form a Buck step-down circuit, and the PWM modulation method is used to control the conduction of the Q5.
- the duty cycle controls the final output voltage of the first DC power supply.
- the final output voltage of the first DC power supply can be obtained to be about 155V, so that the output voltage matched with the second DC power supply is obtained, and then the first DC power supply and the first The positive poles of the two DC power supplies are respectively connected to the A terminal and the B terminal of the controllable switch.
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Abstract
本申请实施例提供了一种大功率便携式用电设备及其电源控制装置及方法,该装置包括第一直流电源和第二直流电源;可控开关,其输入端分别与所述第一直流电源及所述第二直流电源的输出端耦合,所述可控开关的输出端形成所述电源控制装置的输出;控制单元,其检测端通过对应的信号采集模块分别与所述第一直流电源及所述第二直流电源的输出端耦合,且其控制端与所述可控开关的控制端耦合,用于根据所述检测端获取的采样信号控制所述可控开关的切换状态。本申请实施例可提高大功率便携式用电设备的作业持续时间,使得大功率便携式用电设备同时具有便携性和持续作业的能力。
Description
本申请要求2017年11月17日递交的申请号为201711143887.X、发明名称为“大功率便携式用电设备及其电源控制装置及方法”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请涉及大功率便携式用电设备技术领域,尤其是涉及一种大功率便携式用电设备及其电源控制装置及方法。
工业生产中的大功率便携式用电设备(如电焊机、切割机等)需要连接交流电源使用,而在没有交流供电的场所一般需要燃油发电机配合作业。但燃油发电机体积大、重量重、搬运困难,无法满足如高空作业、地下管道维修、矿井施工、应急救灾等工况的应用,而且燃油发电机在工作时会带来空气污染、噪音污染等环保问题。
针对上述问题,目前市场上出现了以锂电池供电的无绳式焊切设备,其具有便携、无污染的优点,单次充电可满载工作10~30分钟,非常适合在野外短时间应急使用。但这种设备也具有明显缺点,因为受限于可充电电池组容量,单次工作时间短,而电池充电时间又相对较长,无法满足持续生产作业需要。
发明内容
本申请实施例的目的在于提供一种大功率便携式用电设备及其电源控制装置及方法,以提高现有大功率便携式用电设备的作业持续时间。
为达到上述目的,一方面,本申请实施例提供了一种大功率便携式用电设备的电源控制装置,包括:
第一直流电源和第二直流电源;
可控开关,其输入端分别与所述第一直流电源及所述第二直流电源的输出端耦合,所述可控开关的输出端形成所述电源控制装置的输出;
控制单元,其检测端通过对应的信号采集模块分别与所述第一直流电源及所述第二直流电源的输出端耦合,且其控制端与所述可控开关的控制端耦合,用于根据所述检测 端获取的采样信号控制所述可控开关的切换状态。
另一方面,本申请实施例还提供了一种大功率便携式用电设备,包括电源控制装置,以及与所述电源控制装置的输出端耦合的负载;所述电源控制装置包括:
第一直流电源和第二直流电源;
可控开关,其输入端分别与所述第一直流电源及所述第二直流电源的输出端耦合,所述可控开关的输出端形成所述电源控制装置的输出;
控制单元,其检测端通过对应的信号采集模块分别与所述第一直流电源及所述第二直流电源的输出端耦合,且其控制端与所述可控开关的控制端耦合,用于根据所述检测端获取的采样信号控制所述可控开关的切换状态。
另一方面,本申请实施例还提供了一种大功率便携式用电设备的电源控制方法,包括:
获取第一直流电源及第二直流电源的采样信号;
根据所述采样信号控制可控开关的切换状态;其中,
所述可控开关的输入端分别与所述第一直流电源及所述第二直流电源的输出端耦合,所述可控开关的输出端形成所述电源控制装置的输出;
所述控制单元的检测端通过对应的信号采集模块分别与所述第一直流电源及所述第二直流电源的输出端耦合,所述控制单元的控制端与所述可控开关的控制端耦合。
本申请实施例大功率便携式用电设备的电源控制装置包括第一直流电源、第二直流电源、可控开关和控制单元;其中,可控开关的输入端分别与第一直流电源及第二直流电源的输出端耦合,可控开关的输出端形成电源控制装置的输出;控制单元的检测端通过对应的信号采集模块分别与第一直流电源及第二直流电源的输出端耦合,控制单元的控制端与可控开关的控制端耦合,控制单元用于根据检测端获取的采样信号控制可控开关的切换状态,因而使得控制单元可根据情况从第一直流电源和第二直流电源中,自动选择一个作为大功率便携式用电设备的供电电源,从而提高了大功率便携式用电设备的作业持续时间,使得大功率便携式用电设备同时具有便携性和持续作业的能力,在有无交流电的情况下都能工作,从而极大扩展了大功率便携式用电设备的应用场景。
为了更清楚地说明本申请实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本 申请中记载的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。在附图中:
图1为本申请一实施例中大功率便携式用电设备的电源控制装置的电路原理方框图;
图2为本申请另一实施例中大功率便携式用电设备的电源控制装置的电路原理方框图;
图3为本申请另一实施例中大功率便携式用电设备的电源控制装置的电路原理方框图;
图4为本申请另一实施例中大功率便携式用电设备的电源控制装置的电路原理方框图;
图5为本申请另一实施例中大功率便携式用电设备的电源控制装置的电路原理方框图;
图6为本申请另一实施例中大功率便携式用电设备的电源控制装置的电路原理方框图;
图7为本申请一实施例中大功率便携式用电设备的电源控制方法的流程图;
图8为本申请一实施例中大功率便携式用电设备的电源控制方法的流程图;
图9为本申请一实施例中大功率便携式用电设备的电源控制装置的电路原理图;
图10为本申请另一实施例中大功率便携式用电设备的电源控制装置的电路原理图。
为了使本技术领域的人员更好地理解本申请中的技术方案,下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都应当属于本申请保护的范围。
本申请实施例的大功率便携式用电设备可以包括电源控制装置,以及与所述电源控制装置的输出端耦合的负载;通过电源控制装置可选择负载的供电电源。在一些实施方式中,所述大功率便携式用电设备例如可以为便携式电焊机、便携式切割机等,这些大功率便携式用电设备一般采用电池供电。
参考图1所示,在本实施方式中,所述大功率便携式用电设备的电源控制装置可以 包括第一直流电源、第二直流电源、可控开关和控制单元。这种方式结构简单、效率高。
在本实施方式中,可控开关的输入端分别与所述第一直流电源及所述第二直流电源的输出端相耦合,所述可控开关的输出端形成所述电源控制装置的输出;所述控制单元的检测端通过对应的信号采集模块分别与所述第一直流电源及所述第二直流电源的输出端相耦合,且所述控制单元的控制端与所述可控开关的控制端相耦合。所述控制单元用于根据所述检测端获取的采样信号控制所述可控开关的切换状态,从而实现对负载的供电电源的选择与控制。
在本实施方式中,所述大功率便携式用电设备可以包括电源控制装置的直流输出可作为大功率便携式用电设备(如电焊机、切割机)的供电电源,从而组成插电式混合动力的大功率便携式用电设备,使得其同时具有便携性和持续作业的能力,在有无交流电的情况下都能工作,极大扩展了大功率便携式用电设备的应用场景。
结合图6所示,在另一实施方式中,所述大功率便携式用电设备的电源控制装置还可以包括充电模块,其分别与所述第一直流电源、所述第二直流电源及所述控制单元耦合;所述充电模块在所述控制单元的控制下可利用所述第一直流电源向所述第二直流电源充电,即将所述第一直流电源输出的直流电作为输入,对所述第二直流电源进行充电。在一些实施方式中,所述的充电可以是恒流充电、恒压充电或恒功率充电。
当所述第二直流电源具备充电条件(电压正常非满电、温度正常)时,所述控制单元开启所述充电模块;当所述第二直流电源异常(如过压、过流、过温等)时,所述控制单元可关闭所述充电模块。如此,在所述第一直流电源有交流电接入并向负载供电的同时,还可以实现对所述第二直流电源进行电能补充,而不需要额外增加充电时间,从而提高了所述大功率便携式用电设备的利用率。
结合图2所示,在另一实施方式中,所述第一直流电源可以包括交流输入端子和整流滤波模块。其中,所述整流滤波模块的输入端与所述交流输入端子耦合,所述整流滤波模块的输出端分别与所述控制单元及所述可控开关耦合。通过交流输入端子所述第一直流电源可接入交流电,例如110V交流电、220V交流电、380V交流电等;所述整流滤波模块可将所述交流电变换成直流电。在一实施方式中,所述交流输入端子可以为电源接头。在一实施方式中,所述整流滤波模块可以为整流滤波电路或集成的整流滤波器件等。
结合图3所示,在另一实施方式中,除了交流输入端子和整流滤波模块外,所述第一直流电源还可以包括直流变换器,以通过升压或降压的方式将所述整流滤波模块输出 的直流电变换成适于负载使用的直流电。其中,所述直流变换器可以为直流-直流变换电路或集成的直流-直流变换器(即Direct Current,简称DC/DC)等。在一些实施方式中,所述直流-直流变换电路例如可以采用全桥、半桥、推挽、Buck、Boost等拓扑结构实现。
结合图2和图3所示,在另一实施方式中,所述第二直流电源可以为可充电电池组,例如可充电锂电池组等。在另一实施方式中,所述可充电电池组可以为可拆卸的,以利于电池组的更换和维护。
结合图4所示,在另一实施方式中,除所述可充电电池组外,所述第二直流电源还可以包括直流变换器,所述直流变换器分别与所述控制单元及所述可充电电池组耦合。如此,所述直流变换器可通过升压或降压的方式将所述可充电电池组输出的直流电变换成适于负载使用的直流电。其中,所述直流变换器可以为直流-直流变换电路或集成的直流-直流变换器等。在一些实施方式中,所述直流-直流变换电路例如可以采用全桥、半桥、推挽、Buck、Boost等拓扑结构实现。
结合图5所示,在一实施方式中,所述第一直流电源还可以包括第一逆变弧焊电路(即图5中的逆变弧焊电路1);所述第二直流电源还可以包括第二逆变弧焊电路(即图5中的逆变弧焊电路2)。其中,所述第一逆变弧焊电路的输入端与所述整流滤波模块的输出端电性连接,所述第一逆变弧焊电路的输出端与所述可控开关的输入端电性连接,且所述第一逆变弧焊电路受控于所述控制单元。所述第二逆变弧焊电路分别与所述控制单元及所述可充电电池组电性连接。
在一些实施方式中,所述控制单元可以通过由电子元器件和逻辑元件(或逻辑电路)等组成的硬件电路实现。
在另一实施方式中,更多情况下,所述控制单元可以为处理器。在一些实施方式中,所述处理器例如可以为微控制单元(Microcontroller Unit,简称MCU)(例如单片机等)、数字信号处理器(Digital Signal Processing,简称DSP)、数字信号控制单元(Digital Signal Controller,简称DSC)、可编程逻辑器件(Programmable Logic Device,简称PLD)、ARM(Acorn RISC Machine)处理器等可编程集成电路模块。
在一些实施方式中,上述的信号采集模块可以为电压采样模块等。
在一些实施方式中,所述可控开关例如可以是直流接触器、直流继电器或其他可控的电子开关器件,如金属-氧化物半导体场效应晶体管(Metal-Oxide-Semiconductor Field-Effect Transistor,简称MOSFET)、双极结型晶体管(Bipolar Junction Transistor,简称BJT)、可控硅、绝缘栅双极型晶体管(Insulated Gate Bipolar Transistor,简称IGBT) 等)。在另一些实施方式中,所述可控开关的开关形式可以是一个单刀双掷或双刀双掷开关,也可以是独立的两个开关等。
在一实施方式中,当所述控制单元采用处理器时,所述根据检测端获取的采样信号控制所述可控开关的切换状态,可以为可根据预设算法处理所述检测端获取的电压信号,并根据处理结果控制所述可控开关的切换状态。
下面介绍大功率便携式用电设备的电源控制方法。
在一实施方式中,所述根据预设算法处理所述检测端获取的电压信号,并根据处理结果控制所述可控开关的切换状态,可以如图7所示,首先根据从检测端获取的电压信号确认所述第一直流电源是否接入交流电;一般的,在没有交流电接入的情况下所述第一直流电源无输出,而一旦有交流电接入后,所述第一直流电源就会输出电压信号,从而可以被所述信号采样模块采集到。
在确认所述第一直流电源接入交流电时,确定所述第一直流电源的输出电压值是否位于预设电压范围,以确定其是否适用于为与所述可控开关的输出端耦合的负载供电。
在确认所述第一直流电源的输出电压值位于所述预设电压范围时,控制所述可控开关工作于所述第一直流电源输出模式。其中,所述控制可控开关工作于所述第一直流电源输出模式是指:当所述可控开关当前未处于所述第一直流电源输出模式时,控制所述可控开关切换至所述第一直流电源输出模式;当所述可控开关当前已处于所述第一直流电源输出模式时,使所述可控开关维持在所述第一直流电源输出模式。
在确认所述第一直流电源的输出电压值位于所述预设电压范围之外时,控制所述可控开关工作于所述第二直流电源输出模式。其中,所述控制可控开关工作于所述第二直流电源输出模式是指:当所述可控开关当前未处于所述第二直流电源输出模式时,控制所述可控开关切换至所述第二直流电源输出模式;当所述可控开关当前已处于所述第二直流电源输出模式时,使所述可控开关维持在所述第二直流电源输出模式。
如图8所示,在另一实施方式中,所述在确认所述第一直流电源的输出电压值位于所述预设电压范围时,控制所述可控开关工作于所述第一直流电源输出模式可以包括:
在确认所述第一直流电源的输出电压值位于所述预设电压范围内,且所述可控开关的输出端无负载接入时,控制所述可控开关工作于所述第一直流电源输出模式。如此,可以防止可控开关带电切换带来的冲击损坏或缩短可控开关寿命。
如图8所示,在另一实施方式中,在确认所述第一直流电源的输出电压值位于所述预设电压范围内,且所述可控开关的输出端有负载接入时,维持所述可控开关的当前状 态(即可控开关不动作)。如此,可以用来防止突然断电对用电设备造成损坏。
在另一实施方式中,所述预设电压范围可以为a(1±b%),其中,a为所述第二直流电源的额定电压值,b为预设常数(根据可根据实际需要确定)。在一实施方式中,所述预设电压范围例如可以为a(1±30%)。也就是说,在本实施方式中,所述第一直流电源的输出电压值应尽量与所述第二直流电源的额定电压值相匹配。在一实施方式中,例如所述第一直流电源的输出电压值为310V的直流电,而预设电压范围在直流217V~403V之间,则确认所述第一直流电源的输出电压值位于所述预设电压范围内。
需要说明的是,无论是如图7所示电源控制方法,还是如图8所示电源控制方法,其都可以是循环执行的。
此外,在一些实施方式中,上述电源控制方法在大功率便携式用电设备正在工作时,不执行切换动作,防止切换过程中的突然断电对大功率便携式用电设备造成损坏,并可防止可控开关带电断开造成的损坏或缩短使用寿命。在一些实施方式中,大功率便携式用电设备是否正在工作可通过采集可控开关的输出端的电流进行判断;可控开关的输出端有电流通过,则说明大功率便携式用电设备正在工作,否则,大功率便携式用电设备处于关机或待机等非工作状态。在一实施方式中,采集可控开关的输出端的电流可通过在可控开关的输出端串联采样电阻实现;在另一实施方式中,采集可控开关的输出端的电流也可以是通过检测大功率便携式用电设备的工作状态触发开关实现。
下面介绍本申请的示例性实施方式。
如图9所示,以逆变焊机设备为例,其中,第一直流电源的交流输入为220V/AC,第一直流电源经二极管D1、D2、D3、D4整流后,再经过电容C1、C2滤波得到310V的直流电,在交流输入电压稳定的条件下,为保证第一直流电源和第二直流电源的电压相差不超过±30%,第二直流电源的可充电电池组的电压应为310V±30%。
在图9所示实施方式中,第二直流电源的可充电电池组由锂电池组成,对于单节标称电压3.6V的锂电池,考虑到存储需要,电量不能完全放空,若其放电电压范围在2.7V~4.2V之间,则可选的锂电池串数为81串~95串。为了获得较佳的效果,锂电池串联后的电压尽可能接近310V电压,本实施方式可设定锂电池串数为86串,组成的可充电锂电池组的标称电压为309.6V,满足上述电源要求。
在图9所示实施方式中,电压采集1由电阻R1、R2分压采集第一直流电源的输出电压,并反馈至控制单元,用于判断第一直流电源是否接入交流电,以及第一直流电源的输出电压是否在正常范围(即预设范围)内。电压采集2由电阻R3、R4分压采集第 二直流电源中可充电电池组的电压,并反馈至控制单元,用于检测可充电电池组的电压是否在正常范围(即预设范围)内,以防止可充电电池组过充、过放。电流采集1用于采集可充电电池组的输出电流,由采样电阻R5将采集的信息反馈至控制单元,防止可充电电池组放电时过流或短路。
在图9所示实施方式中,所述可充电电池组内部还可设有温度采集模块,用于控制单元获取可充电电池组的温度信息,确保可充电电池组在正常温度下充电、放电。
在图9所示实施方式中,所述可充电电池组的输出还串接可控开关2,可控开关2受控于控制单元,只有当电压采集2、电流采集1以及温度采集模块检测的数据都在正常范围内,可控开关2才闭合,若出现欠压、过压、高温、过流等异常情况,控制单元会断开可控开关2,确保可充电电池组的安全使用。
在图9所示实施方式中,所述第一直流电源的输出正极连接可控开关K1的A端,第二直流电源的输出正极连接可控开关K1的B端,第一直流电源和第二直流电源的输出负极短接。
在图9所示实施方式中,所述可控开关的输出为直流输出,连接由开关管Q1、Q2、Q3、Q4,变压器T1,二极管D5、D6,采样电阻R6组成的逆变弧焊电路。所述开关管Q1、Q2、Q3、Q4,变压器T1组成全桥逆变电路,变压器T1输出经二极管D5、D6整成直流输出焊接电源。所述采样电阻R6组成电流采样2,用于根据检测的焊接电流,控制开关管的导通状态,获得适合焊接的输出外特性。
在图9所示实施方式中,当电压采集1检测到第一直流电源有交流电接入,并且电压在正确范围内(310V±30%),控制器控制可控开关连接至A端,此时由第一直流电源单独对逆变弧焊电路供电;当第一直流电源没有接入交流电或电压不正常时,可控开关连接至B端,若可充电电池组的电压、电流、温度等参数正常,则闭合可控开关2,从而由第二直流电源单独对逆变弧焊电路供电。
如图10所示,以逆变焊机设备为例,第一直流电源的交流输入设为220V/AC,经整流滤波后得到310V的直流电;第二直流电源中的可充电电池组设为43串的锂电池组,则可充电电池组的标称电压为154.8V,与第一直流电源整流滤波后的电压相差50%,超过了30%。本示例性实施方式对第一直流电源进行降压处理,以Buck电路为例,开关管Q5、二极管D7、电感L1、电容C3组成Buck降压电路,采用PWM调制的方法控制Q5的导通占空比就可以控制第一直流电源的最终输出电压。例如控制Q5以50%的占空比工作,则可得到第一直流电源最终的输出电压约为155V,这样得到了和第二直流电源 相匹配的输出电压,然后第一直流电源和第二直流电源的正极分别连接可控开关的A端和B端。其他描述请参考图9所示的示例性实施方式,在此不再赘述。
本说明书中的各个实施例均采用递进的方式描述,各个实施例之间相同相似的部分互相参见即可,每个实施例重点说明的都是与其他实施例的不同之处。还需要说明的是,本说明书中的“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含。
以上所述仅为本申请的实施例而已,并不用于限制本申请。对于本领域技术人员来说,本申请可以有各种更改和变化。凡在本申请的精神和原理之内所作的任何修改、等同替换、改进等,均应包含在本申请的权利要求范围之内。
Claims (24)
- 一种大功率便携式用电设备的电源控制装置,其特征在于,包括:第一直流电源和第二直流电源;可控开关,其输入端分别与所述第一直流电源及所述第二直流电源的输出端耦合,所述可控开关的输出端形成所述电源控制装置的输出;控制单元,其检测端通过对应的信号采集模块分别与所述第一直流电源及所述第二直流电源的输出端耦合,且其控制端与所述可控开关的控制端耦合,用于根据所述检测端获取的采样信号控制所述可控开关的切换状态。
- 如权利要求1所述的大功率便携式用电设备的电源控制装置,其特征在于,所述根据所述检测端获取的采样信号控制所述可控开关的切换状态,包括:根据预设算法处理所述检测端获取的电压信号,并根据处理结果控制所述可控开关的切换状态。
- 如权利要求2所述的大功率便携式用电设备的电源控制装置,其特征在于,所述根据预设算法处理所述检测端获取的电压信号,并根据处理结果控制所述可控开关的切换状态,包括:根据所述检测端获取的电压信号确认所述第一直流电源是否接入交流电;在确认所述第一直流电源接入交流电时,确定所述第一直流电源的输出电压值是否位于预设电压范围;在确认所述第一直流电源的输出电压值位于所述预设电压范围时,控制所述可控开关工作于所述第一直流电源输出模式。
- 如权利要求3所述的大功率便携式用电设备的电源控制装置,其特征在于,所述预设算法还包括:在确认所述第一直流电源的输出电压值位于所述预设电压范围之外时,控制所述可控开关工作于所述第二直流电源输出模式。
- 如权利要求3所述的大功率便携式用电设备的电源控制装置,其特征在于,所述在确认所述第一直流电源的输出电压值位于所述预设电压范围时,控制所述可控开关工作于所述第一直流电源输出模式,包括:在确认所述第一直流电源的输出电压值位于所述预设电压范围内,且所述可控开关的输出端无负载接入时,控制所述可控开关工作于所述第一直流电源输出模式。
- 如权利要求3所述的大功率便携式用电设备的电源控制装置,其特征在于,所 述预设算法还包括:在确认所述第一直流电源的输出电压值位于所述预设电压范围内,且所述可控开关的输出端有负载接入时,维持所述可控开关的当前状态。
- 如权利要求3所述的大功率便携式用电设备的电源控制装置,其特征在于,所述预设电压范围为a(1±b%),其中,a为所述第二直流电源的额定电压值,b为预设常数。
- 如权利要求1所述的大功率便携式用电设备的电源控制装置,其特征在于,还包括:充电模块,其分别与所述第一直流电源、所述第二直流电源及所述控制单元耦合,用于在所述控制单元的控制下,利用所述第一直流电源向所述第二直流电源充电。
- 如权利要求求1所述的大功率便携式用电设备的电源控制装置,其特征在于,所述第二直流电源包括可充电电池组。
- 如权利要求9所述的大功率便携式用电设备的电源控制装置,其特征在于,所述可充电电池组可拆卸。
- 如权利要求1所述的大功率便携式用电设备的电源控制装置,其特征在于,所述第一直流电源包括:交流输入端子;整流滤波模块,其输入端与所述交流输入端子耦合,其输出端分别与所述控制单元及所述可控开关耦合。
- 如权利要求11所述的大功率便携式用电设备的电源控制装置,其特征在于,所述第一直流电源还包括:直流变换器,所述整流滤波模块通过所述直流变换器分别与所述控制单元及所述可控开关耦合。
- 如权利要求11所述的大功率便携式用电设备的电源控制装置,其特征在于,所述第一直流电源还包括:第一逆变弧焊电路,其输入端与所述整流滤波模块的输出端耦合,其输出端与所述可控开关的输入端耦合,且所述第一逆变弧焊电路受控于所述控制单元。
- 如权利要求9或10所述的大功率便携式用电设备的电源控制装置,其特征在于,所述第二直流电源还包括:直流变换器,其分别与所述控制单元及所述可充电电池组耦合。
- 如权利要求9或10所述的大功率便携式用电设备的电源控制装置,其特征在于,所述第二直流电源还包括:第二逆变弧焊电路,其分别与所述控制单元及所述可充电电池组耦合。
- 一种大功率便携式用电设备,其特征在于,包括电源控制装置,以及与所述电源控制装置的输出端耦合的负载;所述电源控制装置包括:第一直流电源和第二直流电源;可控开关,其输入端分别与所述第一直流电源及所述第二直流电源的输出端耦合,所述可控开关的输出端形成所述电源控制装置的输出;控制单元,其检测端通过对应的信号采集模块分别与所述第一直流电源及所述第二直流电源的输出端耦合,且其控制端与所述可控开关的控制端耦合,用于根据所述检测端获取的采样信号控制所述可控开关的切换状态。
- 如权利要求16所述的大功率便携式用电设备,其特征在于,所述大功率便携式用电设备为便携式电焊机或便携式切割机。
- 一种大功率便携式用电设备的电源控制方法,其特征在于,包括:获取第一直流电源及第二直流电源的采样信号;根据所述采样信号控制可控开关的切换状态;其中,所述可控开关的输入端分别与所述第一直流电源及所述第二直流电源的输出端耦合,所述可控开关的输出端形成所述电源控制装置的输出;所述控制单元的检测端通过对应的信号采集模块分别与所述第一直流电源及所述第二直流电源的输出端耦合,所述控制单元的控制端与所述可控开关的控制端耦合。
- 如权利要求18所述的大功率便携式用电设备的电源控制方法,其特征在于,所述根据所述检测端获取的电压信号控制所述可控开关的切换状态,包括:根据预设算法处理所述检测端获取的电压信号,并根据处理结果控制所述可控开关的切换状态。
- 如权利要求19所述的大功率便携式用电设备的电源控制方法,其特征在于,所述根据预设算法处理所述检测端获取的电压信号,并根据处理结果控制所述可控开关的切换状态,包括:根据所述检测端获取的电压信号确认所述第一直流电源是否接入交流电;在确认所述第一直流电源接入交流电时,确定所述第一直流电源的输出电压值是否位于预设电压范围;在确认所述第一直流电源的输出电压值位于所述预设电压范围时,控制所述可控开关工作于所述第一直流电源输出模式。
- 如权利要求20所述的大功率便携式用电设备的电源控制方法,其特征在于,所述预设算法还包括:在确认所述第一直流电源的输出电压值位于所述预设电压范围之外时,控制所述可控开关工作于所述第二直流电源输出模式。
- 如权利要求20所述的大功率便携式用电设备的电源控制方法,其特征在于,所述在确认所述第一直流电源的输出电压值位于所述预设电压范围时,控制所述可控开关工作于所述第一直流电源输出模式,包括:在确认所述第一直流电源的输出电压值位于所述预设电压范围内,且所述可控开关的输出端无负载接入时,控制所述可控开关工作于所述第一直流电源输出模式。
- 如权利要求22所述的大功率便携式用电设备的电源控制方法,其特征在于,所述预设算法还包括:在确认所述第一直流电源的输出电压值位于所述预设电压范围内,且所述可控开关的输出端有负载接入时,维持所述可控开关的当前状态。
- 如权利要求20所述的大功率便携式用电设备的电源控制方法,其特征在于,所述预设电压范围为a(1±b%),其中,a为所述第二直流电源的额定电压值,b为预设常数。
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